[oss] [CTF] Unbreakable contest participation

[Raducanu Constantin]

Hello,

My name is Constantin Raducanu, student at SCPD master and I have
participated in the Unbreakable CTF contest. I have solved 4 problems and
here are is a summary of the solutions:
-> Better-cat: The first exercise of the contest and the easiest one. I
have obtained the flag by running the command `strings` on the binary.
-> Tsunami-Researcher: In this case, the flag was hidden in a .wav
file(Waveform
Audio File Format). I have opened the .wav file in the Audacity application
and after playing a little with the settings of the app, I have found the
flag.
-> Russian doll: For this challenge a have received an archive, but after
unzipping it, the content was also an archive. After some more unzipping
and password cracking (using 7zipcrack), I have found the flag.
-> The code: This was a web challenge. I have started this challenge by
running the dirb utility on the url of the webserver. After some
processing, the utility has found the url: "http://webserserver/flag. I
have accessed the URL and this way I have found the flag.

My final place was 53/380.

Best regards,
Constantin Raducanu
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